Is Bun the Next Big Thing for AWS Lambda? A Thorough Investigation

The text discusses the new runtime, Bun, which promises better performance and compatibility with Node.js. However, it also highlights several potential drawbacks, including worse cold start performance due to missing optimizations for custom runtimes, and lack of backward compatibility with many popular libraries. Additionally, there are unknown unknowns related to security vulnerabilities that have not been identified yet. The author recommends caution and patience when considering using Bun in production workloads, especially if security is a top priority. While Bun may offer performance improvements for certain use cases, it's essential to weigh the benefits against the potential risks and to carefully evaluate its compatibility with existing libraries and frameworks before making a decision.

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